142355440 has 20 divisors (see below), whose sum is σ = 330976584. Its totient is φ = 56942144.

The previous prime is 142355419. The next prime is 142355459. The reversal of 142355440 is 44553241.

142355440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 142355399 and 142355408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889642 + ... + 889801.

Almost surely, 2^142355440 is an apocalyptic number.

142355440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142355440 is an abundant number, since it is smaller than the sum of its proper divisors (188621144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142355440 is a wasteful number, since it uses less digits than its factorization.

142355440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779456 (or 1779450 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 142355440 is about 11931.2798978148. The cubic root of 142355440 is about 522.1452794106.

The spelling of 142355440 in words is "one hundred forty-two million, three hundred fifty-five thousand, four hundred forty".